body {
    margin: 40px auto;
    max-width: 650px;
    padding: 0 10px;
    font: 17px 'Open Sans', sans-serif;
    background-color: #15202b;
    color: #ccc;
}
h1,h2,h3 {
  line-height: 1.2;
}
a {
  font-weight: 600;
  color: #ccc;
  text-decoration: none;
  border-bottom: 1px dotted;
}
a:hover {
  text-decoration: none;
  border-bottom: 1px double;
}
p,li {
  line-height: 1.6;
}